cdn

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Painterly night-time world map seen from above, with glowing golden server nodes on several continents connected by arcs of light, some short and some stretching across the globe

What is an edge / CDN? Keeping your site close to your users

Lesson 6 of making it real: the speed trick your vibe-coded app already gets for free. Distance costs time, so a CDN keeps copies of your site on servers near your users — and here's exactly where that stops.

Sam Ortega · 2h ago · 4 min